Which of the following is a common feature of a high-yield savings account?

High-yield savings accounts are designed to provide account holders with a competitive interest rate while maintaining easy access to their funds. One of the most significant characteristics of these accounts is high liquidity, which means that account holders can withdraw their funds or transfer money with relative ease, often without incurring penalties. This feature makes high-yield savings accounts an attractive option for individuals seeking to earn a better return on their cash while still having the flexibility to access their money when needed.

In contrast, variable return rates, while they can occur in some high-yield savings accounts, are not a defining feature, as the interest rate can fluctuate based on the financial institution's policies and market conditions. Permanent maturity does not apply to high-yield savings accounts since these accounts do not have a maturity date, unlike fixed-term deposits. Lastly, long-term lock-in periods are typically associated with fixed investments like CDs (Certificates of Deposit) rather than high-yield savings accounts, which are intended for short-term savings and easy accessibility.